Voice prosthesis



FIG. 1 is a perspective view of a voice prosthesis;

FIG. 2 is a front view of a voice prosthesis;

FIG. 3 is a rear view of a voice prosthesis;

FIG. 4 is a top view of a voice prosthesis;

FIG. 5 is a bottom view of a voice prosthesis;

FIG. 6 is a left side view of a voice prosthesis; and,

FIG. 7 is a right side view of a voice prosthesis.

Portions of the figures shown in dashed lines are for illustrative purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a voice prosthesis, as shown and described. 